Just as the title says, I'm wondering if the OHV's are interference engines? Through a search i found out that the 2.4 and the ecotec's are, but couldn't find any info on the 2.2 or the 2200.
Does anyone know for sure? The ny-jbodies library didn't help either.
Nope, not that I know of. I've never heard of any major issues from breaking a timing chain. Then again, I've never heard of anyone breaking a timing chain although I'm sure someone has. Why, did you break?
No, just trying to see how likely it is that my valve is hitting my piston...
I'll be doing a compresson test today to see if the valves are sealing good. Just seeing how likely it would be.
I fixed one of my rocker studs that had pulled out the threads in the head, and i fixed the threads, and got the stud back in there, assembled it all, and now i try to start it, there sounds like a very bad metal to metal contact sound, and the engine won't stay started at all. It will turn off immediatly, unless i give it gas, which i only did for like a second, because the sound really makes you want to turn off the car. It sounds bad.
I'll figure it out. I was just wondering how likely it was, and just for general knowledge; To see if it was an interference engine.
Yeah, start there and if that doesn't give you the answer you might want to pull the head and see what's happening. You may have dropped a valve or it could be any number of other things. Good luck, bro.
What does it mean to have dropped a valve? The spring and retainers are still holding the valve upright, and it's not falling into the combustion chamber.
any possibility of you bending a pushrod when it happened? I know you probably pulled it out, but it couldn't hurt to check that.. I dunno just thinking outloud here
I'll double check the pushrods tonight. They are chromemoly pushrods, so i doubt they bent, but u never know. I'll check them.
Well, got a little bit of bad news, it looks like one of my valves broke it's tip off in the combustion chamber. Compression test showed 0. I shined a flashlight into the spark plug hole, and i saw the back side of a valve. I'm going to be pulling the head this evening, and should have some pics. and more info on what happened. I'm hoping the bottom end is ok, and not to scratched up, expecially the cylinder walls. I'm going to be getting the patriot performance head with 1 mm oversized valves. Hopefully i can get that quickly. I'll also be cryo treating the new head and valves. More info to come.
Broken valve tulip is not good!
I'm pretty sure it has gouged the piston, but you never know, you might have gotten lucky.
I'm wishing the best for ya.
Ya, i'll see how these cryotreated wiseco forges pistons held up. haha. Having it cryotreated might have helped, but we'll see.
jeez man, when it comes to hard luck among OHV owners, i think you've got the worst case of it i've seen
oh well, broken parts are an excuse for upgrades!
Arrival Blue 04 LS Sport
Eco
Turbo
Megasquirt
'Nuff said
VTLoki wrote:Well, got a little bit of bad news, it looks like one of my valves broke it's tip off in the combustion chamber. Compression test showed 0. I shined a flashlight into the spark plug hole, and i saw the back side of a valve. I'm going to be pulling the head this evening, and should have some pics. and more info on what happened. I'm hoping the bottom end is ok, and not to scratched up, expecially the cylinder walls. I'm going to be getting the patriot performance head with 1 mm oversized valves. Hopefully i can get that quickly. I'll also be cryo treating the new head and valves. More info to come.
Now you know what I meant when I said you might have dropped a valve. Sorry, I didn't get a chance to respond to your question before you answered it yourself. Hope it all works out for you.
Scarab (Jersey Jay 1.8T) wrote:jeez man, when it comes to hard luck among OHV owners, i think you've got the worst case of it i've seen oh well, broken parts are an excuse for upgrades!
x2
fortune cookie say:
better a delay than a disaster.
I'm actually kind of surprised myself. I'm curious to know how many miles he's got on that motor and what all he's done because I've got 200K miles on the original motor, never been rebuilt, and I still haven't had any issues like this.
The motor has 500 miles on it. I don't know how many miles was on it originally, because it came from JBP, but i had to rebuilt it after i got it...
The head is also remanufactured, and has about 500 miles on it too. Mods should be all listed in my profile. I'm very surprised that this happen too. I was talking to stevefire, and he said he had the same thing happen. I wonder if it was because of this higer spring rate from the JBP valve springs.... dunno. Either way, the newer head will be super strong from getting cryo treated, and this shouldn't happen again.
VTLoki: I know exactly what sound you're talking about! The same thing happened to me except it was a faulty spark plug...the ceramic (I think) tip broke off and got down in there. As soon as I heard it, I turned him off. But still, the top of the piston and it's wall got gouged and the valve got damaged. Since I'm all the way over here in bum $%^& Indonesia, I couldn't be around to oversee finding help from my fellow org members (I would've found SOMEONE!) to fix the engine so I just got a new one. DAMMIT!
http://registry.gmenthusiast.com/images/caviefiend/05%20bash%20046.JPG
i hate to say it but i definitely think that after all these problems I'm never going to be buying from or recommending JBP to anybody.... which is a shame because a lot of their products have the potential to be really cool for the j community but thats just too many problems with one engine, and you're the first i've heard of running one of their motors too.
Supposedly they're building chris (sweetnessGT)'s 500-hp-capable LD9, I sure hope they get their @!#$ together on that build better than they did on yours...
Arrival Blue 04 LS Sport
Eco
Turbo
Megasquirt
'Nuff said
If they're using uber strong springs on stock valves I could see the potential for a problem since the spring isn't simply holding the valve but now it's trying to actually yank it out the head. They need to be using valves that can actually stand up to that kind of stress.
And if you don't mind me asking, why did you have to rebuild the motor after buying it? Isn't their whole deal they build the motor for you?
Well, the reason for rebuilding it is a very long 4 page post from last summer, 2005.
You can read about it
here
Also, there is a post of my new build, finishing just end of may 2006,
here
Scarab, it should be noted that the cylinder head was not from them, just the block. I got the cylinder head remanufactured, from a local junk yard. It did get ported by me, and the valve's wer re-done for the 1mm oversized valves. I think that the threads on the head stripped out from pure weakness in the metal... or the spring rate is too high(which would be JBP fault) So, i just wanted to make it clear that the head was built from JBP. I did that myself. But ya, so many problems
Also, I hope from having that valve circle around in there a lot, it didn't damage the cylinde wall at all, but if what caviefiend said is any indication, from jsut having the spark plug bounce around in there, i think my damage would be worse then that. I REALLY hope i don't have to pull that motor AGAIN and re-sleeve that cylinder...
Well, I really wish you the best of luck. My best friend has his Eclipse sitting in a storage unit for this very reason. He dropped a valve and we thought he got lucky because he was sitting at a stop light but we pulled the head and the cylinder walls were pretty jacked. Keep us posted, man. I do remember that post now, I completely forgot about it and didn't realize that was you. But with all the issues I'd say this is the last problem you needed.
When I converted to Roller Rockers, I knew that one stud boss was stripped. It came stripped right from GM.
I knew it was going to give me trouble, but honestly the stud never pulled until about 6 months down the road.
stock valve train, 1.6:1 comp cams roller tip rockers.
heli-coiled it, and never had a problem since.
I just couldn't see you bending a valve because of a rocker stud being pulled.
thank god my new head is OK
ln2johnny wrote:Well, I really wish you the best of luck. My best friend has his Eclipse sitting in a storage unit for this very reason. He dropped a valve and we thought he got lucky because he was sitting at a stop light but we pulled the head and the cylinder walls were pretty jacked. Keep us posted, man. I do remember that post now, I completely forgot about it and didn't realize that was you. But with all the issues I'd say this is the last problem you needed.
Ehhh, that's not what i wanted to hear. It's been raining so bad here in D.C. and I haven't had a chance to pull the head to see how bad it is. I'll find out. I guess the only good news might be that the cylinder that the valve broke in, already has a sleeve in it, so they might just need to press that one out, and put in a new one. The machine shop might not even need to drill out the cylinder.
stevefire wrote:
I just couldn't see you bending a valve because of a rocker stud being pulled.
Ya, i wouldn't think so either.
